Radeon R5 230 missing resolution

Here I have a PC (windows 10) with a newly installed Radeon R5 230. The installation was done with a monitor with a resolution of 1280x1024. But it will be used with a monitor with a resolution 1360x768. The R5 230 seems not to support this resolution. I have listed "All modi" and did not see it. Is there a way to get the 1360x768? I have used the driver which came with the original package.